From: Kevin Wolf <kwolf@redhat.com>
To: "Denis V. Lunev" <den@openvz.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
qemu-devel@nongnu.org, qemu-block@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 1/2] block: minimal bounce buffer alignment
Date: Tue, 12 May 2015 12:29:26 +0200 [thread overview]
Message-ID: <20150512102926.GC3696@noname.str.redhat.com> (raw)
In-Reply-To: <1431409679-16077-2-git-send-email-den@openvz.org>
Am 12.05.2015 um 07:47 hat Denis V. Lunev geschrieben:
> The patch introduces new concept: minimal memory alignment for bounce
> buffers. Original so called "optimal" value is actually minimal required
> value for aligment. It should be used for validation that the IOVec
> is properly aligned and bounce buffer is not required.
>
> Though, from the performance point of view, it would be better if
> bounce buffer or IOVec allocated by QEMU will be aligned stricter.
>
> The patch does not change any alignment value yet.
>
> Signed-off-by: Denis V. Lunev <den@openvz.org>
> CC: Paolo Bonzini <pbonzini@redhat.com>
> CC: Kevin Wolf <kwolf@redhat.com>
> CC: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
next prev parent reply other threads:[~2015-05-12 10:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 5:47 [Qemu-devel] [PATCH v6 0/2] block: enforce minimal 4096 alignment in qemu_blockalign Denis V. Lunev
2015-05-12 5:47 ` [Qemu-devel] [PATCH 1/2] block: minimal bounce buffer alignment Denis V. Lunev
2015-05-12 10:29 ` Kevin Wolf [this message]
2015-05-12 5:47 ` [Qemu-devel] [PATCH 2/2] block: align bounce buffers to page Denis V. Lunev
2015-05-12 10:27 ` Kevin Wolf
2015-05-12 10:36 ` [Qemu-devel] [Qemu-block] " Denis V. Lunev
2015-05-12 13:08 ` Kevin Wolf
2015-05-12 13:13 ` Denis V. Lunev
2015-05-12 10:50 ` [Qemu-devel] " Paolo Bonzini
-- strict thread matches above, loose matches on Subject: below --
2015-05-12 14:30 [Qemu-devel] [PATCH v8 0/2] block: enforce minimal 4096 alignment in qemu_blockalign Denis V. Lunev
2015-05-12 14:30 ` [Qemu-devel] [PATCH 1/2] block: minimal bounce buffer alignment Denis V. Lunev
2015-05-12 13:40 [Qemu-devel] [PATCH v7 0/2] block: enforce minimal 4096 alignment in qemu_blockalign Denis V. Lunev
2015-05-12 13:40 ` [Qemu-devel] [PATCH 1/2] block: minimal bounce buffer alignment Denis V. Lunev
2015-05-04 13:42 [Qemu-devel] [PATCH v5 0/2] block: enforce minimal 4096 alignment in qemu_blockalign Denis V. Lunev
2015-05-04 13:42 ` [Qemu-devel] [PATCH 1/2] block: minimal bounce buffer alignment Denis V. Lunev
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